Nut-lock.



C. J. GRAMSEY.

NUT LOCK.

APPLICATION FILED 00T.6,1913.

l l 2l ,O7 3. Patented De@ 15, 1914.

Z |11 mum (M/vento@ YHE NUR/IS PETFRS C0 PHOTO LITHO wi: L un u 557 described.

rimnn srargsggrnnfr onirica.

CHARLES J. CRAMSEY, 0F .ALLENT`OWN, ENNSYLVANIA.

NUT-LOCK.

To all 'whom t may concern:

Be it known that l, CHARLES J. CRAMsnY, citizen of the United States, residing at Allentown, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful Improvements in Nut- Locks, of which the following is a specification.

This invention relates to an improvement in nut locks.

rlhe primary object of theinvention is to provide a nut lock which will effectually support a nut against displacement and which, at the same time, will not necessitate f the use of removable locking keys or a com plicated pawl and ratchet mechanism.

A further object of the invention is to provide a construction which, while effectuallv holding the nut against rotation in one direction, will permit the nut to be tightened, and in which the lockingmechanism may be conveniently removed when it is desired to remove the nut. i p

A still further object of the invention is to provide a structure in which the locking means will be effectually housed whereit will not be displaced, and in which the housing of said means is accomplished without providing the nut with a chamber or recess, which not only weakens the nut but adds materially to the cost of manufacture.

ln the accompanying drawings: Figure 1 is a side elevation, the nut being shown in locked position. Fig. 2 a longitudinal section. Fig. 3 a perspective view of the locking member. Fig. 1.a detail View of the work engaging nut. Fig. 5 a view showing a modified form of pawl.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawings by the same reference characters.

ln the drawings, 10 designates the bolt which adjacent its terminal is provided with right-hand threads 11. The bolt is formed with a reduced extension 12 provided with left-hand threads 13. The nut 14, after the bolt has beeninserted through the members which are to be clamped together, is placed on the threaded portion 11 of the bolt. rlhe face 15 of the nut is formed with a pluralitv of radially disposed notches 16, the function of which will be hereinafter The reduced extension 12 receives a smaller nut 17, it being understood Speccation of Letters Patent.

Patented Dec. 15, 1914.

application flied october e, 1913. serial No. 793,617.

that in the assembling of the nuts on the bolt, the same are turned in opposite directions. The face 18 of the nut 17 is formed with a plurality of radially disposed notches 19.

The locking means which is interposed between the nuts, consists of a flat strip of resilient material 20 which is bent to embrace the bolt. The extremities of the strip are bent obliquely `with respect to the body portion and toward each other, as indicated at 21, the terminals being again bent in opposite directions to lie at substantially obtuse anglesto the obliquely directed portions of the strip, whereby the terminals will extend longitudinally of the bolt to` engage the notched faces of the nuts. The terminals of the split ring, formed by bending the strip about the bolt, are spaced, and, as the nut 17 is moved toward the nut 1v1-said terminals will be forced toward each other,`

the `pawls 22 and 23 formed by bending the ends of the strip, thusresiliently engaging the notched faces of the nuts, exerting a constant pressure andpreventing the same from being rotated in a direction to effect their removal.

Particular attention is called to the configuration of the terminals of the locking member when in locked position. It will be seen that when the terminals are drawn together, the obliquely disposed portions 24 will contact, the pressure of the nuts, when rotated, thus forcing the pawls 22 and 23 into engagement with the nuts. rIhe terminals are not directly interposed between the contacting faces of the nuts, but have a resilient contact with each other between the nuts, allowing for the tightening of the nuts, but at the same time preventing their removal.

It has been found in practice that when spring washers are interposed between nuts and each end of the washer arranged to contact with both of the nuts, the terminals are either distorted or broken off, rendering the washer ineffective as a means for locking the nuts against displacement. It will be noted in the present construction, that the terminals of the locking member overlap and contact with each other. This structure while providing an effectual locking means, gives the pawls sufficient resiliency to permit the nuts to be tightened.

It will be seen that when the locking member is in position between the nuts, the

of thisl character l`will be clearly apparent as r; :means consists of a flat resilientl member, the

it Will be noted that the same may be easily and economically manufactured and -that the various parts may be readilyassembled.

ln F ig. y5 of the drawings, the locking terminals of Which constitute `paWls. The terminals are curved, their rounded faces engaging in the notches of the nuts and preventing the displacement ofthe nuts. This :structure is particularly adapted Where it is desired to remove the nut Without destroying the locking member. v

Having thus described the invention, what is claimed as nettr is:-

1. A nut lock including a bolt having reversed threadedvportions, nuts engaging the bolt andprovided With notches, and a locking membery interposed lbetween they nuts,

saidmemberincludinga split ring embracying the bolt, theextremities of said ring being bent obliquely to the body portion thereof and toW'ard each other, said ob- -liquely directed portions overlapping and .bearing against each other in the operative position of the locking member, theterminals of the ring being bent lin opposite directions and disposed to engage Ithe notches formed in the nuts.

2. A nut lock including a bolt, a station''- ary member positioned upon the bolt, a nut screw threaded upon the bolt and coacting' With said member, the confronting faces of the nut andthe member being vprovided with notches, and va locking member interposedv between the nut and -said first mentioned member, said locking member including a split ring embracingv the bolt, the eXtremities of said ring being bent obliquely to the body portion thereof-and toward each other, said obliquely directed portions overlapping and bearing against eachother in' the operative positionv of theV locking member, the terminals of the ring being bent in opposite directions and disposed to engage the notches formed in the nut.

In `testimony whereof l afiX my signature in'presence of two Witnesses.

CHARLES J. CRAMSEY. [ns] l/Vitnesses: i Y

MICHAEL J. GALLAGH'ER, WILLIAM J. CRAMrsEY-- L n Copies of this-.patent maybe obtained forive cents each, by addressing thecolnmissioner of Patents;

- Washington D'. C'. 

